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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html><head><meta http-equiv="Content-Type" content="text/html;charset=iso-8859-1"><title>Procyon AVRlib: net/ip.c Source File</title><link href="dox.css" rel="stylesheet" type="text/css"></head><body><!-- Generated by Doxygen 1.4.2 --><div class="qindex"><a class="qindex" href="main.html">Main Page</a> | <a class="qindex" href="modules.html">Modules</a> | <a class="qindex" href="annotated.html">Data Structures</a> | <a class="qindex" href="dirs.html">Directories</a> | <a class="qindex" href="files.html">File List</a> | <a class="qindex" href="functions.html">Data Fields</a> | <a class="qindex" href="globals.html">Globals</a> | <a class="qindex" href="pages.html">Related Pages</a></div><div class="nav"><a class="el" href="dir_000001.html">net</a></div><h1>ip.c</h1><a href="ip_8c.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment">00001 <span class="comment">/*! \file ip.c \brief IP (Internet Protocol) Library. */</span>00002 <span class="comment">//*****************************************************************************</span>00003 <span class="comment">//</span>00004 <span class="comment">// File Name : 'ip.c'</span>00005 <span class="comment">// Title : IP (Internet Protocol) Library</span>00006 <span class="comment">// Author : Pascal Stang</span>00007 <span class="comment">// Created : 8/30/2004</span>00008 <span class="comment">// Revised : 7/3/2005</span>00009 <span class="comment">// Version : 0.1</span>00010 <span class="comment">// Target MCU : Atmel AVR series</span>00011 <span class="comment">// Editor Tabs : 4</span>00012 <span class="comment">//</span>00013 <span class="comment">//*****************************************************************************</span>00014 00015 00016 <span class="preprocessor">#include <inttypes.h></span>00017 <span class="preprocessor">#include "<a class="code" href="global_8h.html">global.h</a>"</span>00018 <span class="preprocessor">#include "<a class="code" href="rprintf_8h.html">rprintf.h</a>"</span>00019 00020 <span class="preprocessor">#include "<a class="code" href="net_8h.html">net.h</a>"</span>00021 <span class="preprocessor">#include "<a class="code" href="nic_8h.html">nic.h</a>"</span>00022 <span class="preprocessor">#include "<a class="code" href="arp_8h.html">arp.h</a>"</span>00023 <span class="preprocessor">#include "<a class="code" href="ip_8h.html">ip.h</a>"</span>00024 <a name="l00025"></a><a class="code" href="ip_8c.html#a0">00025</a> <span class="keyword">struct </span><a class="code" href="structipConfig.html">ipConfig</a> IpMyConfig; <span class="comment">///< Local IP address/config structure</span>00026 <span class="comment"></span>00027 <a name="l00028"></a><a class="code" href="group__ip.html#ga0">00028</a> <span class="keywordtype">void</span> <a class="code" href="group__ip.html#ga0">ipSetConfig</a>(uint32_t myIp, uint32_t <a class="code" href="structipConfig.html#o1">netmask</a>, uint32_t gatewayIp)00029 {00030 <span class="keyword">struct </span>netEthAddr ethaddr;00031 00032 <span class="comment">// set local addressing</span>00033 IpMyConfig.<a class="code" href="structipConfig.html#o0">ip</a> = myIp;00034 IpMyConfig.<a class="code" href="structipConfig.html#o1">netmask</a> = netmask;00035 IpMyConfig.<a class="code" href="structipConfig.html#o2">gateway</a> = gatewayIp;00036 00037 <span class="comment">// set ARP association</span>00038 nicGetMacAddress(ethaddr.addr);00039 <a class="code" href="group__arp.html#ga1">arpSetAddress</a>(&ethaddr, myIp);00040 }00041 <a name="l00042"></a><a class="code" href="group__ip.html#ga1">00042</a> <span class="keyword">struct </span><a class="code" href="structipConfig.html">ipConfig</a>* <a class="code" href="group__ip.html#ga1">ipGetConfig</a>(<span class="keywordtype">void</span>)00043 {00044 <span class="keywordflow">return</span> &IpMyConfig;00045 }00046 00047 <span class="comment">// deprecated</span>00048 <span class="comment">/*</span>00049 <span class="comment">uint32_t ipGetMyAddress(void)</span>00050 <span class="comment">{</span>00051 <span class="comment"> return IpMyConfig.ip;</span>00052 <span class="comment">}</span>00053 <span class="comment">*/</span>00054 <a name="l00055"></a><a class="code" href="group__ip.html#ga3">00055</a> <span class="keywordtype">void</span> <a class="code" href="group__ip.html#ga3">ipSend</a>(uint32_t dstIp, uint8_t protocol, uint16_t len, uint8_t* data)00056 {00057 <span class="comment">// make pointer to ethernet/IP header</span>00058 <span class="keyword">struct </span>netEthIpHeader* ethIpHeader;00059 00060 <span class="comment">// move data pointer to make room for headers</span>00061 data -= ETH_HEADER_LEN+IP_HEADER_LEN;00062 ethIpHeader = (<span class="keyword">struct </span>netEthIpHeader*)data;00063 00064 <span class="comment">// debugPrintHexTable(len+ETH_HEADER_LEN+IP_HEADER_LEN, data);</span>00065 00066 <span class="comment">// adjust length to add IP header</span>00067 len += IP_HEADER_LEN;00068 00069 <span class="comment">// fill IP header</span>00070 ethIpHeader->ip.destipaddr = <a class="code" href="group__net.html#ga34">HTONL</a>(dstIp);00071 ethIpHeader->ip.srcipaddr = <a class="code" href="group__net.html#ga34">HTONL</a>(IpMyConfig.<a class="code" href="structipConfig.html#o0">ip</a>);00072 ethIpHeader->ip.proto = protocol;00073 ethIpHeader->ip.len = <a class="code" href="group__net.html#ga2">htons</a>(len);00074 ethIpHeader->ip.vhl = 0x45;00075 ethIpHeader->ip.tos = 0;00076 ethIpHeader->ip.ipid = 0;00077 ethIpHeader->ip.ipoffset = 0;00078 ethIpHeader->ip.ttl = <a class="code" href="group__ip.html#ga5">IP_TIME_TO_LIVE</a>;00079 ethIpHeader->ip.ipchksum = 0;00080 00081 <span class="comment">// calculate and apply IP checksum</span>00082 <span class="comment">// DO THIS ONLY AFTER ALL CHANGES HAVE BEEN MADE TO IP HEADER</span>00083 ethIpHeader->ip.ipchksum = <a class="code" href="group__net.html#ga4">netChecksum</a>(&ethIpHeader->ip, IP_HEADER_LEN);00084 00085 <span class="comment">// add ethernet routing</span>00086 <span class="comment">// check if we need to send to gateway</span>00087 <span class="keywordflow">if</span>( (dstIp & IpMyConfig.<a class="code" href="structipConfig.html#o1">netmask</a>) == (IpMyConfig.<a class="code" href="structipConfig.html#o0">ip</a> & IpMyConfig.<a class="code" href="structipConfig.html#o1">netmask</a>) )00088 {00089 <a class="code" href="group__arp.html#ga4">arpIpOut</a>(ethIpHeader,0); <span class="comment">// local send</span>00090 <span class="comment">//rprintf("Sending IP packet on local net\r\n");</span>00091 }00092 <span class="keywordflow">else</span>00093 {00094 <a class="code" href="group__arp.html#ga4">arpIpOut</a>(ethIpHeader,IpMyConfig.<a class="code" href="structipConfig.html#o2">gateway</a>); <span class="comment">// gateway send</span>00095 <span class="comment">//rprintf("Sending IP packet to gateway\r\n");</span>00096 }00097 00098 <span class="comment">// adjust length to add ethernet header</span>00099 len += ETH_HEADER_LEN;00100 00101 <span class="comment">// debug</span>00102 <span class="comment">//debugPrintHexTable(ETH_HEADER_LEN, &data[0]);</span>00103 <span class="comment">//debugPrintHexTable(len-ETH_HEADER_LEN, &data[ETH_HEADER_LEN]);</span>00104 00105 <span class="comment">// send it</span>00106 <a class="code" href="group__nic.html#ga1">nicSend</a>(len, data);00107 }00108 <a name="l00109"></a><a class="code" href="group__ip.html#ga4">00109</a> <span class="keywordtype">void</span> <a class="code" href="group__ip.html#ga4">udpSend</a>(uint32_t dstIp, uint16_t dstPort, uint16_t len, uint8_t* data)00110 {00111 <span class="comment">// make pointer to UDP header</span>00112 <span class="keyword">struct </span>netUdpHeader* udpHeader;00113 <span class="comment">// move data pointer to make room for UDP header</span>00114 data -= UDP_HEADER_LEN;00115 udpHeader = (<span class="keyword">struct </span>netUdpHeader*)data;00116 <span class="comment">// adjust length to add UDP header</span>00117 len += UDP_HEADER_LEN;00118 <span class="comment">// fill UDP header</span>00119 udpHeader->destport = <a class="code" href="group__net.html#ga33">HTONS</a>(dstPort);00120 udpHeader->srcport = <a class="code" href="group__net.html#ga33">HTONS</a>(dstPort);00121 udpHeader->udplen = <a class="code" href="group__net.html#ga2">htons</a>(len);00122 udpHeader->udpchksum = 0;00123 00124 <span class="comment">// debugPrintHexTable(UDP_HEADER_LEN, (uint8_t*)udpPacket);</span>00125 00126 <a class="code" href="group__ip.html#ga3">ipSend</a>(dstIp, IP_PROTO_UDP, len, (uint8_t*)udpHeader);00127 }00128 <a name="l00129"></a><a class="code" href="group__ip.html#ga2">00129</a> <span class="keywordtype">void</span> <a class="code" href="group__ip.html#ga2">ipPrintConfig</a>(<span class="keyword">struct</span> <a class="code" href="structipConfig.html">ipConfig</a>* config)00130 {00131 <a class="code" href="group__rprintf.html#ga15">rprintfProgStrM</a>(<span class="stringliteral">"IP Addr : "</span>); <a class="code" href="group__net.html#ga6">netPrintIPAddr</a>(config-><a class="code" href="structipConfig.html#o0">ip</a>); <a class="code" href="group__rprintf.html#ga5">rprintfCRLF</a>();00132 <a class="code" href="group__rprintf.html#ga15">rprintfProgStrM</a>(<span class="stringliteral">"Netmask : "</span>); <a class="code" href="group__net.html#ga6">netPrintIPAddr</a>(config-><a class="code" href="structipConfig.html#o1">netmask</a>); <a class="code" href="group__rprintf.html#ga5">rprintfCRLF</a>();00133 <a class="code" href="group__rprintf.html#ga15">rprintfProgStrM</a>(<span class="stringliteral">"Gateway : "</span>); <a class="code" href="group__net.html#ga6">netPrintIPAddr</a>(config-><a class="code" href="structipConfig.html#o2">gateway</a>); <a class="code" href="group__rprintf.html#ga5">rprintfCRLF</a>();00134 }</pre></div><hr size="1"><address style="align: right;"><small>Generated on Sun Oct 29 03:41:07 2006 for Procyon AVRlib by <a href="http://www.doxygen.org/index.html"><img src="doxygen.png" alt="doxygen" align="middle" border="0"></a> 1.4.2 </small></address></body></html>⌨️ 快捷键说明
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